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imx233: fix typos and sdmmc bug regarding write buffer

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The write buffer should not be modified but the current code does and then
forget to restore it to its original content. I'm not sure if any code relies
to the write buffer to not be modifies by the write function but this seems like
a reasonable assumption in general so it's better not to break it.

Change-Id: I449a01db2ec51d2273e59b69c59db0e7d2eed3db
This commit is contained in:
Amaury Pouly 2014-04-23 23:44:11 +02:00
parent 54dd77a5f8
commit 25ecbc5432
1 changed files with 6 additions and 2 deletions
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8
firmware/target/arm/imx233/sdmmc-imx233.c
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@ -648,14 +648,15 @@ static int transfer_sectors(int drive, unsigned long start, int count, void *buf
* Read transfers:
* If the buffer is already aligned, transfer everything at once.
* Otherwise, transfer all sectors but one to the sub-buffer starting
* on the next cache ligned and then move the data. Then transfer the
* on the next cache line and then move the data. Then transfer the
* last sector to the aligned_buffer and then copy to the buffer.
*
* Write transfers:
* If the buffer is already aligned, transfer everything at once.
* Otherwise, copy the first sector to the aligned_buffer and transfer.
* Then move all other sectors within the buffer to make it cache
* aligned and transfer it.
* aligned and transfer it. Then move data to pretend the buffer was
* never modified.
*/
if(read)
{
@ -689,6 +690,9 @@ static int transfer_sectors(int drive, unsigned long start, int count, void *buf
// move within the buffer and transfer
memmove(ptr, buf + 512, 512 * (count - 1));
ret = __xfer_sectors(drive, start + 1, count - 1, ptr, read);
// move back
memmove(buf + 512, ptr, 512 * (count - 1));
memcpy(buf, aligned_buffer[drive], 512);
}
}
else